Single account payment device



FIG. 1 is a perspective view of single account payment device showing my new design.

FIG. 2 is a front view thereof;

FIG. 3 is a side view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a rear view thereof;

FIG. 6 is another side view thereof; and,

FIG. 7 is a bottom view thereof. 

The ornamental design for a single account payment device, as shown and described. 